Abraham block



@uiten tatrs Lwtf-ruft @fitta IMPROVED SLUICE-BLANKT.

@igt Srigchnie metten tu im tigrse ettetsntmt ma making part lnf its same.

TO ALL WHOM I'l MAY CONCERN;

Be it` known that I, ABRAHAM BLOCI, of the city and county of San Francisco, and State of California, have invented a new and improved Sluice-Blanket for Catching the Sulph'rets; and I do hereby declare that the following is the mode of manufacturing the same.

My improvement consists in weaving ribs or ridges in this cloth, and thereby forming bars or obstructions on the surface of the wvoollen cloth or blanket, vvhich ribs or ridges serve to arrest and retain the sulphurets as they are carried along over the blanket/by the water in the sluiee. g

The drawing is a perspective vien of my improved blanket, of which A is the body and B the ribs or ridges.` These ribs or ridges can be produbed at any distances reqnired and desirable, and are' made by throwing in the fabric, say, an Ordinary blanket, when being manufactured, a heavy double and twisted yarn, (the size of which can be regulated to suit requirements,) from six to twelve thicknesses, and throwing this twisted yarn on what is termed by Weavers theflight shade, which will cause the whole body` of the rib or ridge-to appear on they face of the fabric. These ribs or ridges can be formed on either or both sides ofthe fabric, by throwing' the heavy twisted yarn either on the upper or lower light shade, or on both, at the distances required. The ribbed or ridged cloth can be manufactured of any Width desired.

I make'no claim to any particular kind of machinery for producing my improved blanket, as it may be readily woven by a skilled operator upon any of the looms Ordinarily employed toproduce the common sluiceblankets, when the description I have given is followed.

Having thus described my invention, I claim, an`d desire to secure by Letters Patent as an improved article of manufaeture- A sluice-blanket provided with Woven ribs, substantially as herein described.

A. BLOCK.

Witnesses:

HENRY HAIGnT,

RECINALD H. Sm'rn. 

